Friday, January 12, 2007

How to leak a secret and not get caught

Leaking a sensitive government document can mean risking a jail sentence - but not for much longer if an online service called WikiLeaks goes ahead. WikiLeaks is designed to allow anyone to post documents on the web without fear of being traced.

The creators of the site are thought to include political activists and open-source software engineers, though they are keeping their identities secret. Their goal is to ensure that whistle-blowers and journalists are not thrown into jail for emailing sensitive documents. That was the fate of Chinese journalist Shi Tao, who was sentenced to a 10-year term in 2005 after publicising an email from Chinese officials about the anniversary of the Tiananmen Square massacre.

According to the group's website www.wikileaks.org, its primary targets include China, Russia, and oppressive regimes in Eurasia, the Middle East and sub-Saharan Africa. It is not limited to these countries, however, and people anywhere will be able to use the site to reveal unethical behaviour by governments and corporations. "Targets include China, Russia and oppressive regimes in the Middle East"

Normally an email or a document posted to a website can be traced back to its source because each data packet carries the IP address of the last server that it passed through. To prevent this, WikiLeaks will exploit an anonymising protocol known as The Onion Router (Tor), which routes data through a network of servers that use cryptography to hide the path that the packets took.

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